Field and Colliery Surveying: A Primer Designed for the Use of Students of Surveying and Colliery Manager AspirantsMacmillan & Company, 1911 - 263 páginas |
Dentro del libro
Resultados 1-5 de 51
Página viii
... HEIGHTS AND 55 Two points , inaccessible from one to the other Two points , inaccessible from one to the other , and one inaccessible to the surveyor 57 སྤྲ་ ཙ་ Two points , both inaccessible to the surveyor The height viii COLLIERY ...
... HEIGHTS AND 55 Two points , inaccessible from one to the other Two points , inaccessible from one to the other , and one inaccessible to the surveyor 57 སྤྲ་ ཙ་ Two points , both inaccessible to the surveyor The height viii COLLIERY ...
Página ix
... height of a tower on level ground , the tower being inaccessible The depth of a proposed shaft SURFACE SURVEYING- General Procedure · CHAPTER VIII The Field Book Surveying with One Line only Triangulation Town Surveys Trigonometrical ...
... height of a tower on level ground , the tower being inaccessible The depth of a proposed shaft SURFACE SURVEYING- General Procedure · CHAPTER VIII The Field Book Surveying with One Line only Triangulation Town Surveys Trigonometrical ...
Página 19
... . 43 ) are equal to one another , as also are the triangles ABC and DEF ( Fig . 44 ) . XIII . A triangle is equivalent to half a parallelogram , having the same base and height . Thus the triangle ABC III 19 GEOMETRY.
... . 43 ) are equal to one another , as also are the triangles ABC and DEF ( Fig . 44 ) . XIII . A triangle is equivalent to half a parallelogram , having the same base and height . Thus the triangle ABC III 19 GEOMETRY.
Página 20
... height . Thus the triangle ABC ( Fig . 45 ) is half the parallelogram DBCE . XIV . In any right - angled triangle the square described upon the hypothenuse is equal to the sum of the squares described on DEA B G H F B ט FIG . 45 . the ...
... height . Thus the triangle ABC ( Fig . 45 ) is half the parallelogram DBCE . XIV . In any right - angled triangle the square described upon the hypothenuse is equal to the sum of the squares described on DEA B G H F B ט FIG . 45 . the ...
Página 25
... height of arc T = 3 · 1416 n ° = number of degrees in arc . a h C no FIG . 59 . f 1 For more detailed particulars and examples on Mensuration the student is referred to Mining Calculations . ( 2 ) and ( 3 ) p = d 25 MENSURATION- Lengths.
... height of arc T = 3 · 1416 n ° = number of degrees in arc . a h C no FIG . 59 . f 1 For more detailed particulars and examples on Mensuration the student is referred to Mining Calculations . ( 2 ) and ( 3 ) p = d 25 MENSURATION- Lengths.
Términos y frases comunes
accuracy accurate acres adjusted alidade ascertain back-sight calculated centre chain line chord clamped clinometer coal colliery column commences compass box contour lines datum line dial difference direction distance division drawing drawn dumpy level equal error example fast needle feet Field Book figure fixed fore-sight frustum graduated Gunter's chain height horizontal hypothenuse inch inclination instrument isogonic lines legs length limb magnetic bearing magnetic declination magnetic meridian magnetic needle marked means measurements meridian angle meridian base line meridian line method necessary needle survey observation obtained offsets parallel parallel ruler perpendicular placed plotted pricker protractor radius reduced level right angles road ruler scale screw seam shaft shown by Fig side sight line sight vanes spirit level square station straight line surveyor taken taking telescope theodolite tie line traverse triangle true north underground survey vernier plate vernier reading yards zero
Pasajes populares
Página 22 - To draw a straight line at right angles to a given straight line, from a given point in the same.
Página 164 - Triangles on the same base, and between the same parallels, are equal.
Página 19 - Any two sides of a triangle are together greater than the third side.
Página 249 - A section of the strata sunk through, or, if that is not reasonably " practicable, a statement of the depth of the shaft with a section
Página 248 - Every such plan must be on a scale of not less than that of the Ordnance Survey of twenty-five inches to the mile, or on the same scale as the plan for the time being in use at the mine.
Página 16 - A diameter of a circle is a straight line drawn through the centre, and terminated both ways by the circumference.
Página 19 - When the three angles of one are equal to the three angles of the other, each to each, the adjoining diagram shews that the triangles need not be equal in all respects.
Página 12 - A plane superficies is that in which any two points being taken, the straight line between them lies wholly in that superficies.
Página 21 - To bisect a given finite straight line, that is, to divide it into two equal parts. Let AB be the given straight line; it is required to divide it into two equal parts.
Página 34 - We have, then, that the sine of an angle is equal to the cosine of its complement, and conversely.